JP2916592B2 - Beam lifting method and structure - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a method of elevating and lowering a beam suitable for use in constructing a frame of a structure and a structure thereof.

"Conventional technology" Conventionally, when building a structural body, when raising and lowering a beam, the beam has been raised and lowered with an interval between columns.
That is, after the column is pre-constructed at a predetermined position, the beam is lifted by a lifting machine such as a crane, and the column and the beam are joined at a predetermined height of the column.

[Problems to be Solved by the Invention] However, according to the conventional method, since the column and the beam are not structurally coupled at the time of lifting of the beam, the beam is in an unstable state when ascending or descending or after ascending or descending. .

In addition, when the beam is repeatedly moved up and down, it is structurally difficult to stop the beam and join the column.

Furthermore, horizontal movement of the beam, deformation of the column, and the like are likely to occur during the ascent and descent.

The present invention has been made in view of the above circumstances, it can be a structurally stable state at the time of lifting and lowering of the beam, it can be structurally easily coupled at the time of stop when repeated lifting and lowering, It is still another object of the present invention to provide a method of elevating and lowering a beam which does not cause horizontal movement of a beam, deformation of a column, and the like during elevating and lowering, and a structure thereof.

[Means for Solving the Problems] The method for elevating and lowering a beam according to the present invention includes the steps of: first providing a beam having an annular portion that opens in the direction in which the column extends; Is inserted, and the beam is raised and lowered in a state in which a sliding movable supporting body is disposed in a gap between the annular portion and the column.

Further, in the beam lifting / lowering structure according to the present invention, an annular portion that opens in the direction in which the pillar extends is provided on the beam, and the annular portion is formed so that a pillar to be constructed can be inserted. It is characterized in that a supporting member that can slide freely is arranged between the supporting members.

Further, the beam may be constituted by members of a plurality of floors.

[Operation] In the lifting structure of the beam according to the present invention, when the beam moves horizontally, deforms the column, or the like when the beam is raised or lowered, a force is transmitted by the supporting member between the column and the beam.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

In FIG. 1 to FIG. 5, reference numeral 1 denotes a column constituting the skeleton of the structure, and reference numeral 3 denotes a beam constituting the skeleton of the structure similarly to the column 1.

A plurality of columns 1 are connected in a state where they are separated from each other to form a composite column 5.

A plurality of beams 3 are connected in a state where they are separated from each other to form a composite beam 7. At both ends of this composite beam 7,
Annular members 9, 9 that open in a direction orthogonal to the extending direction of the composite beam 7 are provided.

The annular member 9 is formed so as to have an inner surface (in the illustrated example of FIG. 1, a rectangle) slightly larger in diameter than the outer periphery of the composite column 5. As shown in FIGS. 2 and 3, the annular member 9 is fixedly joined to both ends of the composite beam 7 and a reinforcement disposed from an intermediate portion of the composite beam 7 toward the annular member 9. It is fixedly supported by a support member 10.

The supporting members 11 are composed of a sliding member such as a roller, and are provided one above and below the bent portion on the inner surface of the annular member 9, that is, 16 in total. These bearing members 11
Is set so as to be rotatable in the opening direction of the annular member 9, that is, in the extending direction of the composite column 5.

The raising / lowering mechanism of the composite beam 7 is composed of a step rod 13 for holding the composite beam 7 up and down, a load receiving beam 15, and a hydraulic jack 17 for driving these.

When the composite beam 7 is raised and lowered, after the composite column 5 is erected in advance, the annular member 9 is inserted through the composite column 5 and the composite beam 7 is connected to the step rod 13 and the load beam 15.
Support with. Then, by operating the hydraulic jack 17, the step rod 13 and the load receiving beam 15 are moved up and down to move the composite beam 7 up and down.

According to this embodiment, the transmission of the bending moments (indicated by the symbol M in FIG. 3) of the composite column 5 and the composite beam 7 is
Since the force can be transmitted (indicated by reference numerals A and B in FIG. 3) by the supporting body 11, it can be handled as a rigid rigid body as a whole. Therefore, even when the composite beam 7 is raised and lowered, the beam does not become unstable, and an excellent effect that the beam can be raised and lowered in a stable state is exhibited.

Even when the composite beam 7 is repeatedly moved up and down, it can be easily connected structurally when the composite beam 7 is stopped, so that work efficiency can be improved.

The method of raising and lowering the beam and the structure of raising and lowering the beam according to the present invention are not limited to the above embodiment, and other modifications are also possible. For example, in the above-described embodiment, only the composite columns and composite beams have been described, but the present invention can be applied to columns and beams that are not composite.

[Effects of the Invention] According to the method for elevating and lowering a beam and the elevating structure according to the present invention, the transmission of the bending moment in two directions of the column and the beam can be transmitted by the supporting body, and therefore the rigid contact is made as a whole. It can be treated the same as a ramen body. Therefore, the beam does not become unstable even when the beam is raised and lowered, and an excellent effect that the beam can be raised and lowered in a stable state is exhibited.

Further, even when the beam is repeatedly moved up and down, it is possible to easily combine the structure at the time of stopping, so that the work efficiency can be improved.

[Brief description of the drawings]

1 to 5 are views showing an embodiment of a beam lifting / lowering structure according to the present invention, wherein FIG. 1 is a plan view of a frame during construction, FIG. 2 is a side sectional view, and FIG. The figure is a side sectional view showing the vicinity of the joint between the composite column and the annular member, FIG. 4 is a side view showing the elevating mechanism of the composite beam, and FIG. 5 is a plan view showing the vicinity of the joint between the composite column and the annular member. 1 ... column, 3 ... beam, 5 ... composite column, 7 ... composite beam, 9
... annular member, 11 ... supporting body.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Mitsunori Mokuya 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima-shi, Hiroshima Mitsubishi Heavy Industries, Ltd. Hiroshima Works (72) Inventor Yoichi Seki 2--16 Kyobashi, Chuo-ku, Tokyo 1 Shimizu Construction Co., Ltd. (72) Inventor Yoji Moroi 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Masaaki Nakanishi 2-6-1 Kyobashi, Chuo-ku, Tokyo Shimizu Within Construction Co., Ltd. (72) Inventor Koji Kondo 2-161-1, Kyobashi, Chuo-ku, Tokyo Shimizu Corporation (72) Inventor Junichiro Maeda, 2-6-1 Kyobashi, Chuo-ku, Tokyo Shimizu Corporation (56) References JP-A-3-72129 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E04G 21/16

Claims (3)

(57) [Claims] 1. A beam having an annular portion that opens in the direction in which a pillar extends is provided in advance, and after the pillar is erected in advance, the annular portion is inserted through the pillar, and a gap between the annular portion and the pillar is provided. A method of lifting and lowering a beam, wherein the beam is raised and lowered in a state where a slidingly movable supporting body is disposed in a gap. 2. A beam is provided with an annular portion that opens in the direction in which the pillar extends, and the annular portion is formed so as to allow a pillar to be constructed to be inserted, and a slide-movable support is provided between the annular portion and the pillar. A lifting structure for a beam, wherein a pressure body is arranged. 3. The lifting structure of a beam according to claim 2, wherein said beam is constituted by members of a plurality of floors.